PEP 822: update d-string spec and rejected ideas.

[methane]

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📚 Documentation preview 📚: https://pep-previews--4787.org.readthedocs.build/

[bwoodsend]

Very subjective but am I the only one who wishes that the spaces replaced with underscores for clarity picked a character that's easier to count consecutive runs of? Every time I see ____ I need to highlight part of the string to figure out how many underscores it has.

[hugovk]

Yes, perhaps ---- or ···· would be better?